Compile file_manager and eliminate gyp v1 from Files App!

ui/file_manager/externs/compiled_resources2.gyp

 # Copyright 2017 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 ########################################################
 #    NOTE: THIS FILE IS GENERATED. DO NOT EDIT IT!     #
 # Instead, run create_include_gyp.py to regenerate it. #
 ########################################################
 {
   'targets': [
@@ skipping 59 matching lines @@
     },
     {
       'target_name': 'es6_workaround',
       'includes': ['../../../third_party/closure_compiler/include_js.gypi'],
     },
     {
       'target_name': 'exif_entry',
       'includes': ['../../../third_party/closure_compiler/include_js.gypi'],
     },
     {
-      'target_name': 'file_browser_background',
-      'includes': ['../../../third_party/closure_compiler/include_js.gypi'],
-    },
-    {
       'target_name': 'file_operation_progress_event',
       'includes': ['../../../third_party/closure_compiler/include_js.gypi'],
     },
     {
       'target_name': 'files_elements',
       'includes': ['../../../third_party/closure_compiler/include_js.gypi'],
     },
     {
       'target_name': 'gallery_background',
       'includes': ['../../../third_party/closure_compiler/include_js.gypi'],
@@ skipping 49 matching lines @@
     {
       'target_name': 'volume_manager',
       'includes': ['../../../third_party/closure_compiler/include_js.gypi'],
     },
     {
       'target_name': 'webview_tag',
       'includes': ['../../../third_party/closure_compiler/include_js.gypi'],
     },
   ],
 }